Windows 8.1 MongoDB adapter

Hi there, I just need a little help for my project. I just want to know what is wrong with my setup.

Here is my code.

config.php

<?php

return new \Phalcon\Config(array(
    'database' => array(
        'adapter'     => 'mongo',
        'host'        => 'localhost',
        'username'    => 'root',
        'password'    => '',
        'dbname'      => 'test_db',
    ),
    'application' => array(
        'controllersDir' => __DIR__ . '/../../app/controllers/',
        'modelsDir'      => __DIR__ . '/../../app/models/',
        'viewsDir'       => __DIR__ . '/../../app/views/',
        'pluginsDir'     => __DIR__ . '/../../app/plugins/',
        'libraryDir'     => __DIR__ . '/../../app/library/',
        'cacheDir'       => __DIR__ . '/../../app/cache/',
        'baseUri'        => '/store/',
    )
));

services.php

<?php

use Phalcon\DI\FactoryDefault;
use Phalcon\Mvc\View;
use Phalcon\Mvc\Url as UrlResolver;
use Phalcon\Db\Adapter\Pdo\Mysql as DbAdapter;
use Phalcon\Mvc\View\Engine\Volt as VoltEngine;
use Phalcon\Mvc\Model\Metadata\Memory as MetaDataAdapter;
use Phalcon\Session\Adapter\Files as SessionAdapter;

/**
 * The FactoryDefault Dependency Injector automatically register the right services providing a full stack framework
 */
$di = new FactoryDefault();

/**
 * The URL component is used to generate all kind of urls in the application
 */
$di->set('url', function () use ($config) {
    $url = new UrlResolver();
    $url->setBaseUri($config->application->baseUri);

    return $url;
}, true);

/**
 * Setting up the view component
 */
$di->set('view', function () use ($config) {

    $view = new View();

    $view->setViewsDir($config->application->viewsDir);

    $view->registerEngines(array(
        '.volt' => function ($view, $di) use ($config) {

            $volt = new VoltEngine($view, $di);

            $volt->setOptions(array(
                'compiledPath' => $config->application->cacheDir,
                'compiledSeparator' => '_'
            ));

            return $volt;
        },
        '.phtml' => 'Phalcon\Mvc\View\Engine\Php'
    ));

    return $view;
}, true);

/**
 * Database connection is created based in the parameters defined in the configuration file
 */
$di->set('db', function () use ($config) {
    return new DbAdapter(array(
        'host' => $config->database->host,
        'username' => $config->database->username,
        'password' => $config->database->password,
        'dbname' => $config->database->dbname
    ));
});

/**
 * If the configuration specify the use of metadata adapter use it or use memory otherwise
 */
$di->set('modelsMetadata', function () {
    return new MetaDataAdapter();
});

/**
 * Start the session the first time some component request the session service
 */
$di->set('session', function () {
    $session = new SessionAdapter();
    $session->start();

    return $session;
});

$di['mongo'] = function() {
    $mongo = new Mongo();
    return $mongo->selectDb("test_db");
};

//Collection manager
$di['collectionManager'] = function() {
    return new CollectionManager();
};

Whenever I run the cmd and type phalcon model users I got an error message "Error : Adapter mongo is not supported"